﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExampleClass
{
    class CRectangle
    {
        int width, height;
        public CRectangle(int a, int b)
        {
            width = a;
            height = b;
        }
        public int area()
        {
            return (width * height);
        }
     }
    class Program
    {
        static void Main(string[] args)
        {
            CRectangle recta = new CRectangle(3, 4);
            CRectangle rectb = new CRectangle(5, 6);
            Console.WriteLine("rect a:{0}", recta.area());
            Console.WriteLine ("rect b: {0}", rectb.area());
         }
    }
}
